For the orthographic projection as a map projection, see Orthographic projection in cartography. For mathematical discussion in terms of linear algebra, see Projection (linear algebra).
Bullfrogs are the largest real frog found in North America, weighing up to 0.5 kg and measuring 460 mm in length. Their average length is 100-175 mm. Their color varies from brownish to shades of green, often with spots or blotches of a darker color around their backs. Their back feet are fully webbed.
Yule log. The Yule log, Yule clog, or Christmas block is a specially selected log burnt on a hearth as a Christmas tradition in a number of countries in Europe. The origin of the folk custom is unclear. Numerous scholars have observed that, like other traditions associated with Yule, the custom may ultimately derive from Germanic paganism.